I can't help but feel the last photo on the bottom-right could be right out of a Dragon Ball Z episode.

I think the second from the right on the top row and the first from the left on the bottom row have the most potential. The former looks quite menacing like you're preparing for a vicious attack, the latter has a "teleport-back-to-base"-serenity attached to it. Add a little hover and keep the feet symetrical and you got yourself a winner.